Steering Gear - Disassembly
Using SST, secure the power steering gear assembly.
Steering Gear - Removal
Remove the 4 bolts and the front lower suspension member protector.
Steering Gear - Components
Lexus IS250 IS220d GSE20 ALE20 POWER STEERING
Electronic Power Steering System - Ps Warning Light Does Not Come On
Using the intelligent tester, check for DTCs and confirm that there are no problems in the CAN communication system.
Electronic Power Steering System - Ps Warning Light Remains On
The power steering ECU is connected to the combination meter via CAN and multiplex communications. If any of the following are detected, the PS warning light remains on.
Dtc U0105 Lost Communication With Ecm
The power steering ECU assembly receives signals from the ECM, skid control ECU, and steering control ECU via CAN communication.
Dtc U0105 Lost Communication With Ecm
The power steering ECU assembly receives signals from the ECM, skid control ECU, and steering control ECU via CAN communication.
Dtc C1581 Assist Map Number Un-Writing
The power steering ECU assembly outputs this DTC when it determines that the assist map is not written in the ECU.
Dtc C1552 Pig Power Supply Voltage Malfunction
This circuit supplies power to drive the power steering motor.
Dtc C1551 Ig Power Supply Voltage Malfunction
If the power steering ECU assembly determines that there is a malfunction in the IG circuit inside the ECU, it outputs this DTC. This DTC is not output when there is an open circuit in the wire harness connected to terminal IG or a battery voltage drop.